diff --git a/Makefile b/Makefile
index 9661fbc..17fb7f8 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ build: 3rd-party-licenses.txt
 	$(ZIP) ../$(DIST)/$(PACKAGE_NAME)-$(PACKAGE_VERSION).zip -j ../LICENSE; \
 	cp $(MANIFEST) ../$(DIST); \
 	sed -i 's/ (dev)//g' ../$(DIST)/$(MANIFEST); \
+	sed -i 's/.dev"/"/g' ../$(DIST)/$(MANIFEST); \
 	$(ZIP) ../$(DIST)/$(PACKAGE_NAME)-$(PACKAGE_VERSION).zip -j ../$(DIST)/$(MANIFEST); \
 	rm -f ../$(DIST)/$(MANIFEST);
 
diff --git a/extension/manifest.json b/extension/manifest.json
index 19bcdec..ccd2cae 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -9,23 +9,23 @@
   "options_page": "options.html",
   "input_components": [
     {
-      "name": "SKK(for US keyboard)",
+      "name": "SKK (dev)(for US keyboard)",
       "type": "ime",
-      "id": "org.jmuk.skk.us",
+      "id": "org.jmuk.skk.us.dev",
       "description": "An SKK clone",
       "language": "ja",
       "layouts": ["us"]
     },{
-      "name": "SKK(for Japanese keyboard)",
+      "name": "SKK (dev)(for Japanese keyboard)",
       "type": "ime",
-      "id": "org.jmuk.skk.jp",
+      "id": "org.jmuk.skk.jp.dev",
       "description": "An SKK clone",
       "language": "ja",
       "layouts": ["jp"]
     },{
-      "name": "SKK(for Dvorak keyboard)",
+      "name": "SKK (dev)(for Dvorak keyboard)",
       "type": "ime",
-      "id": "org.jmuk.skk.dvorak",
+      "id": "org.jmuk.skk.dvorak.dev",
       "description": "An SKK clone",
       "language": "ja",
       "layouts": ["us-dvorak"]